Question

Из пенала,в котором лежат 8простых и 12 цветных карандашей,достат один карандаш, Каковп вероятность того,что этот карандаш окажется: а)простым; б) цветным?

Answer 1

Думаю будет так
всего 12+8=20карандашей
а)вероятность того что карандаш булет простым 8/20=2/5=0,4
б) цветным 12/20=3/5=0,6

Answer 2

Probability of Drawing a Pencil from the Pencil Case

To calculate the probability of drawing a specific type of pencil from the pencil case, we can use the following formula:

Probability = (Number of favorable outcomes) / (Total number of possible outcomes)

Given: - Total number of pencils = 8 simple + 12 colored = 20 pencils

Probability of Drawing a Simple Pencil

The probability of drawing a simple pencil from the pencil case can be calculated as follows:

Probability of drawing a simple pencil = (Number of simple pencils) / (Total number of pencils)

Probability of drawing a simple pencil = 8 / 20

Probability of drawing a simple pencil = 0.4

Therefore, the probability of drawing a simple pencil from the pencil case is 0.4.

Probability of Drawing a Colored Pencil

Similarly, the probability of drawing a colored pencil from the pencil case can be calculated as follows:

Probability of drawing a colored pencil = (Number of colored pencils) / (Total number of pencils)

Probability of drawing a colored pencil = 12 / 20

Probability of drawing a colored pencil = 0.6

Therefore, the probability of drawing a colored pencil from the pencil case is 0.6.

So, to summarize: - The probability of drawing a simple pencil is 0.4. - The probability of drawing a colored pencil is 0.6.